$(document)
		.ready(
				function() {

					var name = $.checkcookie("name");

					if (name != "") {

						$("#login_div").html(
							"<a href=\"\" target=\"_blank\">"
							+ name
							+ "</a><span class=\"masthead-link-separator\">|</span>"
							+ "<a href=\"#\" id=\"logout_a\">退出</a>"
						);
						
						$("#logout_a").click(function(){
							
							$.savecookie("name", "", -1);
							
						});

					}

				});

jQuery.checkcookie = function(c_name) {
	if (document.cookie.length > 0) {
		c_start = document.cookie.indexOf(c_name + "=");
		if (c_start != -1) {
			c_start = c_start + c_name.length + 1;
			c_end = document.cookie.indexOf(";", c_start);
			if (c_end == -1)
				c_end = document.cookie.length;
			return unescape(document.cookie.substring(c_start, c_end));
		}
	}
	return "";
};


jQuery.savecookie = function(key, value, expiredays) {
	var exdate = new Date();
	exdate.setDate(exdate.getDate() + expiredays);
	document.cookie = key + "=" + escape(value)+";"
			+ ((expiredays == null) ? "" : "; expires=" + exdate.toGMTString()) + ";path=/;";

};

